Adjustable liquid fuel atomizing nozzle

Abstract

The application discloses a kind of adjustable liquid fuel atomizing nozzles, multiple tangential grooves are formed uniformly in the circumferential direction in the inner wall of the core swirl part of swirl core before core swirl part;Center body adjusting surface part and swirl chamber main part wall and swirl chamber contraction part wall form swirl chamber cavity, liquid is sprayed into swirl chamber from tangential groove, and does centrifugal motion in swirl chamber cavity, and finally is sprayed from nozzle outlet;Center body adjusting surface part is inserted into the core swirl part of swirl core and cooperates with the gap between the inner wall of core swirl part, increase the depth of center body adjusting surface part inserted into the core swirl part of swirl core, can reduce the cross-sectional area of tangential groove, make swirl intensity strengthen, atomization angle increase, atomization effect is improved.The adjustable liquid fuel atomizing nozzle of the application can be applied to various occasions, can make the application range of various products wider, more flexible, and can adjust atomization characteristics according to actual situation.

Description

Technical Field

[0001] This invention relates to the field of combustion equipment technology, and in particular to an adjustable liquid fuel atomizing nozzle. Background Technology

[0002] The non-adjustable nature of traditional fuel nozzles limits their application range, restricting them to specific operating conditions. This reduces efficiency during engine idle or gas turbine acceleration and deceleration, and limits the application of fuel nozzles with certain geometric features to specific mechanical products. For example, when the flow rate is constant, a tangential orifice / groove with a certain geometric feature may be used, but as the flow rate decreases, the swirl intensity of this orifice / groove decreases, the atomization angle shrinks, and the atomization effect deteriorates.

[0003] Figure 11 The diagram illustrates the actual function of existing liquid fuel atomizing nozzles in a sprayer. Black dots represent nozzle positions, and black circles represent the spray range. The left side shows the spray range of the existing nozzle at a given flow rate. However, the gardener has planted more flowers and plants; simply increasing the flow rate would lead to… Figure 11 The situation on the right side resulted in an excessively large spraying area, leading to a waste of water resources. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an adjustable liquid fuel atomizing nozzle that can be applied to a variety of occasions, making the application range of various products wider and more flexible, and allowing the atomization characteristics to be adjusted according to actual conditions.

[0005] To solve the above-mentioned technical problems, the present invention provides an adjustable liquid fuel atomizing nozzle, which includes an adjusting rod 1, a top cover 5, a bottom cover 8, a swirl core 7, a central body 6, and a plurality of helical springs 602.

[0006] The top cover 5 has an adjustment part and a rear cavity part that are coaxially connected together in a rear-to-front sequence, and the inner diameter of the rear cavity part is larger than the inner diameter of the adjustment part.

[0007] An annular positioning plate 503 is formed on the inner side of the middle part of the adjustment section;

[0008] The adjustment part on the front side of the positioning plate 503 is integrally fixed and connected to a liquid inlet hole 504;

[0009] The bottom cover 8 has a front cavity part, a swirling chamber main body part 805, and a swirling chamber contraction part 804 that are coaxially fixedly connected from rear to front. A nozzle 803 is formed at the front end of the swirling chamber contraction part 804.

[0010] The inner diameter of the front cavity is larger than the inner diameter of the main body of the cyclone chamber 805, forming a step at the joint;

[0011] The rear cavity is coaxially connected and fixed to the front cavity to form the main cavity of the nozzle;

[0012] The swirling core 7 has a core travel section and a core swirling section that are integrally and coaxially fixed from back to front.

[0013] The inner diameter of the core swirling section is smaller than the inner diameter of the core travel section, forming a step at the joint;

[0014] Multiple tangential grooves 706 are uniformly formed circumferentially on the inner wall of the front part of the core swirling section;

[0015] Multiple spring holes 704 with rearward openings are evenly arranged circumferentially on the tube wall of the core swirling section.

[0016] The swirling core 7 is assembled and fixed in the main cavity of the nozzle, with its front end attached to the rear end of the tube wall of the swirling chamber main body 805.

[0017] The central body 6 has a central body guide part and a central body adjustment part 604 that are integrally and coaxially fixedly connected from the rear to the front.

[0018] The outer diameter of the central body guide portion is larger than the outer diameter of the central body adjustment portion 604, forming a step at the joint;

[0019] The central body 6 is coaxially assembled in the swirling core 7, and the central body adjustment part 604 is inserted into the core swirling part of the swirling core 7 and is gap-fitted with the inner wall of the core swirling part.

[0020] The plurality of helical springs 602 have their front ends respectively placed in the corresponding spring holes 704, and their rear ends respectively abutting against the front end of the central body guide portion;

[0021] The adjusting rod 1 has a stroke control part and a connecting part 102 that are integrally and coaxially fixed to each other in the front and rear.

[0022] The outer diameter of the stroke control part is larger than the outer diameter of the connecting part 102, forming a step at the joint;

[0023] The outer diameter of the stroke control part is larger than the inner diameter of the annular positioning plate 503, and the outer diameter of the connecting part is smaller than the inner diameter of the annular positioning plate 503.

[0024] The connecting part passes through the annular positioning plate 503, and its front end abuts against the rear end of the central body 6;

[0025] The stroke control unit is assembled together with the rear part of the adjustment unit of the top cover 5.

[0026] Preferably, the adjustment part on the rear side of the positioning plate 503 is formed with an internal thread 501 of the top cover.

[0027] The stroke control unit is assembled with the internal thread 501 of the top cover via an external thread, and is also threadedly engaged with the adjustment part of the top cover 5.

[0028] Preferably, the rear end face of the stroke control part of the adjusting rod 1 is formed with a positioning hole 105.

[0029] Preferably, the rear end of the stroke control section of the adjusting rod 1 is formed with an internal hexagonal groove 104;

[0030] The front end 103 of the connecting part of the adjusting rod 1 is a circular plane.

[0031] Preferably, at least one swirling core positioning hole 705 is formed at the front end of the tube wall of the core swirling section;

[0032] At least one bottom end cover positioning post 802 is formed at the rear end of the tube wall of the swirl chamber main body 805 of the bottom end cover 8;

[0033] The bottom cover positioning post 802 is inserted into the corresponding vortex core positioning hole 705.

[0034] Preferably, the step at the junction of the swirl chamber main body 805 of the bottom cover 8 and the front cavity body is a flow-guiding rounded corner 806.

[0035] Preferably, multiple axial adjustment guides 701 are formed circumferentially on the inner wall of the core travel section;

[0036] Multiple axial ribs 601 are formed circumferentially on the outer side of the central body guide portion;

[0037] The rib 601 on the outer side of the guide section of the center body is matched and assembled with the adjusting guide rail 701 on the inner wall of the core travel section to fix the circumferential position of the center body 6 relative to the swirling core 7.

[0038] Preferably, a radial anti-vibration protrusion 703 is formed on the outer side of the swirling core 7;

[0039] The radial vibration damping boss 703 and the bottom cover 8 are clearance fit.

[0040] Preferably, a swirling core sealing groove 702 is formed at the junction of the swirling part of the core body 7 and the core stroke part;

[0041] A sealing ring 10 is embedded in the swirl core sealing groove 702;

[0042] The sealing ring 10 is formed with a plurality of circular holes 1001;

[0043] The diameter of the round hole 1001 is the same as that of the spring hole 704;

[0044] The plurality of helical springs 602 pass through the corresponding circular holes 1001 one by one.

[0045] Preferably, the outer side of the front end of the rear cavity of the top cover 5 is formed with a top cover external thread 505.

[0046] The rear end of the front cavity of the bottom cover 8 is formed with a bottom cover internal thread 801.

[0047] The top cover 5 and the bottom cover 8 are coaxially connected by the external thread 505 of the top cover and the internal thread 801 of the bottom cover, and are sealed and reinforced by the cavity sealing gasket 9 and spot welded to form the main cavity of the nozzle.

[0048] Preferably, the inner wall surface of the cyclone chamber main body 805 is a cylindrical surface;

[0049] The inner wall surface of the vortex chamber contraction section 804 is a frustoconical surface that is coarser at the back and thinner at the front.

[0050] Preferably, a hose clamp 3 is provided at the rear end of the top cover to lock and seal the rear end of the top cover with the stroke control part of the adjusting rod 1.

[0051] Preferably, a top cover sealing groove 502 is formed on the rear side of the joint between the adjustment part of the top cover 5 and the positioning plate 503.

[0052] The outer periphery of the annular adjusting sealing gasket 4 is embedded into the sealing groove 502 of the top cover.

[0053] Preferably, the adjustable liquid fuel atomizing nozzle further includes a liquid supply interface 2;

[0054] The liquid supply interface 2 is threadedly connected to the liquid inlet 504 of the top cover 5.

[0055] Preferably, the axial adjustable distance range of the central body 6 is less than 30 mm.

[0056] The adjustable liquid fuel atomizing nozzle of the present invention has a plurality of tangential grooves 706 uniformly formed circumferentially on the inner wall of the front part of the swirling section of the core body 7. After the liquid fuel is sprayed out from the tangential grooves 706, the tangential grooves 706 allow the liquid fuel to adhere to the wall surface of the main body 805 of the swirling chamber in the form of a liquid film and flow there. The central body adjustment part 604, the wall surface of the main body 805 of the swirling chamber, and the wall surface of the swirling chamber contraction part 804 form a swirling chamber cavity. The liquid is sprayed into the swirling chamber from the tangential grooves 706, undergoes centrifugal motion in the swirling chamber cavity, and is finally sprayed out from the nozzle 803. A plurality of tangential grooves 706 are uniformly formed circumferentially on the tube wall of the core swirling section. The spring hole 704 faces backward, and the front end of the helical spring 602 can be embedded in the spring hole 704. The diameter tolerance of the spring hole 704 is positive. The central body adjustment surface 604 extends into the core swirling part of the swirling core 7 and is fitted with a clearance between it and the inner wall of the core swirling part to prevent wear caused by repeated adjustments. Increasing the depth of the central body adjustment surface 604 extending into the core swirling part of the swirling core 7 can reduce the cross-sectional area of ​​the tangential groove 706, which can maintain the atomization characteristics of the fuel nozzle under the original flow conditions. Further reducing the cross-sectional area can strengthen the swirling intensity, increase the atomization angle, and improve the atomization effect. This adjustable liquid fuel atomizing nozzle can be applied to various occasions, making the application range of various products wider and more flexible. It can also adjust the atomization characteristics according to the actual situation. Especially under non-rated operating conditions, this type of nozzle is more flexible. According to the operator's experience and the relevant instructions of this invention, the depth of the central body adjustment face 604 protruding into the core swirl section of the swirl core 7 can be changed in time. This not only avoids the trouble of replacing the nozzle when modifying the product design, but also solves the problem of poor atomization effect under non-rated operating conditions. Attached Figure Description

[0057] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic cross-sectional view of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention in its deepest adjustment position;

[0059] Figure 2 This is a schematic cross-sectional view of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention in its shallowest adjustment position;

[0060] Figure 3 This is a perspective view of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0061] Figure 4This is a perspective view of the adjusting rod of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0062] Figure 5 This is a perspective view of the top cover of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0063] Figure 6 This is a perspective view of the central body of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0064] Figure 7 This is a perspective view of the swirl core of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0065] Figure 8 This is a perspective view of the bottom cover of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0066] Figure 9 This is a perspective view of a perforated sealing ring according to an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention;

[0067] Figure 10 This is a schematic diagram of the control function of an embodiment of the adjustable liquid fuel atomizing nozzle of the present invention in an engine or gas turbine;

[0068] Figure 11 This is a schematic diagram illustrating the actual function of existing liquid fuel atomizing nozzles in a sprayer.

[0069] Explanation of reference numerals in the attached figures:

[0070] 1 Adjusting rod; 101 External thread of stroke control part; 102 Connecting part; 103 Front end of connecting part; 104 Internal hexagonal groove; 105 Positioning hole; 5 Top cover; 501 Internal thread of top cover; 502 Sealing groove of top cover; 503 Positioning plate; 504 Liquid inlet hole; 505 External thread of top cover; 6 Central body; 601 Rib; 602 Helical spring; 604 Adjusting surface of central body; 7 Swirl core; 701 Adjusting guide rail; 70 2. Swirl core sealing groove; 703. Radial anti-vibration boss; 704. Spring hole; 705. Swirl core positioning hole; 706. Tangential groove; 8. Bottom cover; 801. Bottom cover internal thread; 802. Bottom cover positioning post; 803. Nozzle; 804. Swirl chamber contraction section; 805. Swirl chamber main body; 806. Guide radius; 10. Sealing ring; 1001. Round hole; 9. Cavity sealing gasket; 3. Hose clamp; 4. Annular adjusting sealing gasket; 2. Liquid supply interface. Detailed Implementation

[0071] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0072] Example 1

[0073] like Figure 1 , Figure 2 , Figure 3 As shown, the adjustable liquid fuel atomizing nozzle includes an adjusting rod 1, a top cover 5, a bottom cover 8, a swirl core 7, a central body 6, and multiple helical springs 602.

[0074] like Figure 5 As shown, the top cover 5 has an adjustment part and a rear cavity part that are coaxially connected together in a rear-to-front manner, and the inner diameter of the rear cavity part is larger than the inner diameter of the adjustment part.

[0075] An annular positioning plate 503 is formed on the inner side of the middle part of the adjustment section;

[0076] The adjustment part on the front side of the positioning plate 503 is integrally fixed and connected to a liquid inlet hole 504;

[0077] like Figure 8 As shown, the bottom cover 8 has a front cavity part, a swirling chamber main body part 805 and a swirling chamber contraction part 804 that are coaxially fixedly connected from the rear to the front, and a nozzle 803 is formed at the front end of the swirling chamber contraction part 804.

[0078] The inner diameter of the front cavity is larger than the inner diameter of the main body of the cyclone chamber 805, forming a step at the joint;

[0079] The rear cavity is coaxially connected and fixed to the front cavity to form the main cavity of the nozzle;

[0080] like Figure 7 As shown, the swirling core 7 has a core travel section and a core swirling section that are integrally and coaxially fixed from rear to front;

[0081] The inner diameter of the core swirling section is smaller than the inner diameter of the core travel section, forming a step at the joint;

[0082] Multiple tangential grooves 706 are uniformly formed circumferentially on the inner wall of the front part of the core swirling section;

[0083] Multiple spring holes 704 with rearward openings are evenly arranged circumferentially on the tube wall of the core swirling section.

[0084] The swirling core 7 is assembled and fixed in the main cavity of the nozzle, with its front end attached to the rear end of the tube wall of the swirling chamber main body 805.

[0085] like Figure 6 As shown, the central body 6 has a central body guide portion and a central body adjustment portion 604 that are integrally and coaxially fixedly connected from the rear to the front;

[0086] The outer diameter of the central body guide portion is larger than the outer diameter of the central body adjustment portion 604, forming a step at the joint;

[0087] The central body 6 is coaxially assembled in the swirling core 7, and the central body adjustment part 604 is inserted into the core swirling part of the swirling core 7 and is gap-fitted with the inner wall of the core swirling part.

[0088] The plurality of helical springs 602 have their front ends respectively placed in the corresponding spring holes 704, and their rear ends respectively abutting against the front end of the central body guide portion;

[0089] like Figure 4 As shown, the adjusting rod 1 has a stroke control part and a connecting part 102 that are integrally and coaxially fixed to each other in the front and rear.

[0090] The outer diameter of the stroke control part is larger than the outer diameter of the connecting part 102, forming a step at the joint;

[0091] The outer diameter of the stroke control part is larger than the inner diameter of the annular positioning plate 503, and the outer diameter of the connecting part is smaller than the inner diameter of the annular positioning plate 503.

[0092] The connecting part passes through the annular positioning plate 503, and its front end abuts against the rear end of the central body 6;

[0093] The stroke control unit is assembled together with the rear part of the adjustment unit of the top cover 5.

[0094] Figure 1 The image shows an adjustable liquid fuel atomizing nozzle with the central body adjustment face 604 inserted into the swirling section of the swirling core 7 at its deepest adjustment position. Figure 2 As shown, when the adjusting rod 1 is moved back, the helical spring 602 just disengages from the bottom of the spring hole, and the depth of the central body adjusting face 604 protruding into the core vortex section of the vortex core 7 is at the shallowest adjustment position. However, in actual application, it is not recommended to adjust it in this way because the preload of the helical spring 602 disappears, and long-term use may cause it to loosen and fall off.

[0095] In the adjustable liquid fuel atomizing nozzle of Embodiment 1, multiple tangential grooves 706 are uniformly formed circumferentially on the inner wall of the front part of the swirling section of the swirling core 7. After the liquid fuel is sprayed out from the tangential grooves 706, the tangential grooves 706 allow the liquid fuel to adhere to the wall surface of the swirling chamber main body 805 in the form of a liquid film and flow. The central body adjustment part 604, together with the wall surface of the swirling chamber main body 805 and the wall surface of the swirling chamber contraction part 804, forms a swirling chamber cavity, and the liquid flows from the tangential grooves 706... The fluid is injected into the vortex chamber and undergoes centrifugal motion within the vortex chamber cavity before finally being ejected from the nozzle 803. Multiple spring holes 704 with rearward openings are evenly arranged circumferentially on the vortex section tube wall of the core body. The front end of the helical spring 602 can be embedded in the spring hole 704, and the diameter tolerance of the spring hole 704 is positive. The central body adjustment surface 604 extends into the core vortex section of the vortex core 7 and is fitted with a clearance between it and the inner wall of the core vortex section to prevent wear caused by repeated adjustments.

[0096] The adjustable liquid fuel atomizing nozzle of Embodiment 1 increases the depth of the central body adjustment surface 604 protruding into the core swirl section of the swirl core 7, which can reduce the cross-sectional area of ​​the tangential groove 706. This allows the fuel nozzle to maintain the atomization characteristics under the original flow conditions. Further reducing the cross-sectional area can enhance the swirl intensity, increase the atomization angle, and improve the atomization effect.

[0097] The adjustable liquid fuel atomizing nozzle of Embodiment 1 can be applied to various occasions, making the application range of various products wider and more flexible. It can adjust the atomization characteristics (including atomization angle, Sothel average diameter, liquid mist penetration ability, pressure-flow curve, etc.) according to the actual situation. Especially in non-rated operating conditions, this type of nozzle is more flexible. According to the operator's experience and the relevant instructions of the present invention, the depth of the central body adjustment face 604 protruding into the core swirl section of the swirl core 7 can be changed in time. This not only avoids the trouble of replacing the nozzle when modifying the product design, but also solves the problem of poor atomization effect under non-rated operating conditions.

[0098] like Figure 10 The control function of the adjustable liquid fuel atomizing nozzle shown in the diagram, applied to an engine or gas turbine, inevitably reduces the liquid fuel flow rate during initial and deceleration conditions. Under low flow conditions, the existing nozzle exhibits poor atomization. The adjustable liquid fuel atomizing nozzle of Example 1, under rated operating conditions, selects the most suitable depth to which the central body adjustment face 604 penetrates the swirling section of the swirling core 7. At low flow rates, by increasing the depth of penetration of the central body adjustment face 604 into the swirling section of the swirling core 7, a good atomization effect can still be maintained. Through repeated experiments to explore its atomization characteristics at different depths, the optimal curve conforming to the control function law for the adjustable liquid fuel atomizing nozzle of Example 1 can be found.

[0099] The control function relates the displacement distance of the central body 6 and the flow coefficient under a certain liquid supply pressure. It enables the nozzle to be suitable for the engine's idle and cruise states, the acceleration, full load, and deceleration processes of gas turbines, and the water-saving or pesticide-related issues in agricultural spraying. It also enables the sprayers in park landscapes to have a wider working range, and in specific temperature control fields, such as cooling and constant temperature, it can have a wider working range.

[0100] Example 2

[0101] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 1, the adjustment part on the rear side of the positioning plate 503 has an inner thread 501 of the top cover.

[0102] The stroke control unit is assembled with the internal thread 501 of the top cover via the external thread 101, and is also threadedly engaged with the adjustment part of the top cover 5.

[0103] Preferably, the rear end face of the stroke control part of the adjusting rod 1 is formed with a positioning hole 105.

[0104] The positioning hole 105 is used to determine the depth of adjustment. The adjusting rod 1 equipped with the positioning hole 105 can adjust the position of the center body 6 according to the thread pitch, so that the cross-sectional area of ​​the tangential groove 706 of the center body 6 and the swirl core 7 will change.

[0105] The positioning hole 105 is matched with the thread pitch. When operating the adjusting rod 1, the positioning hole 105 of the adjusting rod 1 should be used as a reference. First, adjust the adjusting rod 1 to the deepest (front) position and turn it upward. When the positioning hole 105 is rotated to the same position again, it means that the center body 6 has shifted forward (deep) by a thread pitch. Finally, the position of the center body 6 can be determined.

[0106] Preferably, the rear end of the stroke control section of the adjusting rod 1 is formed with an internal hexagonal groove 104;

[0107] The front end 103 of the connecting part of the adjusting rod 1 is a circular plane, which abuts against the rear end of the central body 6 and is used to push the central body 6 forward.

[0108] Example 3

[0109] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 1, at least one swirling core positioning hole 705 is formed at the front end of the core swirling section tube wall of the swirling core 7.

[0110] At least one bottom end cover positioning post 802 is formed at the rear end of the tube wall of the swirl chamber main body 805 of the bottom end cover 8;

[0111] The bottom cover positioning post 802 is inserted into the corresponding vortex core positioning hole 705.

[0112] Preferably, the step at the junction of the swirl chamber main body 805 of the bottom cover 8 and the front cavity body is a flow-guiding rounded corner 806.

[0113] In the adjustable liquid fuel atomizing nozzle of Embodiment 3, the bottom cover positioning post 802 cooperates with the swirl core positioning hole 705 to realize the circumferential and radial positioning of the bottom cover 8 and the swirl core 7, preventing the swirl core 7 from rotating circumferentially or displacing radially (due to vibration or the flow of special fluids causing the swirl core to move). This can enhance the vibration resistance and anti-loosening ability of the adjustable liquid fuel atomizing nozzle.

[0114] Example 4

[0115] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 1, multiple axial adjustment guides 701 are formed circumferentially on the inner wall of the core stroke section of the swirl core 7.

[0116] Multiple axial ribs 601 are formed circumferentially on the outer side of the central body guide portion of the central body 6;

[0117] The rib 601 on the outer side of the guide section of the center body is matched and assembled with the adjusting guide rail 701 on the inner wall of the core travel section to fix the circumferential and radial positions of the center body 6 relative to the swirling core 7.

[0118] Example 5

[0119] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 4, a radial anti-vibration boss 703 is formed on the outer side of the swirling core 7;

[0120] The radial vibration damping boss 703 and the bottom cover 8 are fitted with a clearance to prevent radial vibration of the swirling core 7.

[0121] Example 6

[0122] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 5, a swirling core sealing groove 702 is formed at the junction of the core swirling part and the core stroke part of the swirling core 7.

[0123] A sealing ring 10 is embedded in the swirl core sealing groove 702;

[0124] like Figure 9 As shown, the sealing ring 10 has a plurality of circular holes 1001;

[0125] The diameter of the round hole 1001 is the same as that of the spring hole 704;

[0126] The plurality of helical springs 602 pass through the corresponding circular holes 1001 one by one.

[0127] The adjustable liquid fuel atomizing nozzle of Embodiment Six has a sealing ring 10 embedded in the swirl core sealing groove 702. The sealing ring 10 has multiple round holes 1001, which can play a sealing role to prevent the liquid in the swirl chamber from leaking back into the spring hole, and also allow the helical spring 602 to be inserted into the spring hole.

[0128] Example 7

[0129] Based on the adjustable liquid fuel atomizing nozzle of Embodiment Six, the outer side of the front end of the rear cavity of the top cover 5 is formed with a top cover external thread 505.

[0130] The rear end of the front cavity of the bottom cover 8 is formed with a bottom cover internal thread 801.

[0131] The top cover 5 and the bottom cover 8 are coaxially connected by the external thread 505 of the top cover and the internal thread 801 of the bottom cover, and are sealed and reinforced by the cavity sealing gasket 9 and spot welded to form the main cavity of the nozzle.

[0132] In the adjustable liquid fuel atomizing nozzle of Example 7, to prevent loosening that may occur between the bottom cover 8 and the top cover 5 due to long-term use, the top cover 5 and the bottom cover 8 are connected by threads, reinforced by spot welding, and sealed with a cavity sealing gasket 9 to prevent liquid leakage. The top cover 5 and the bottom cover 8 are made of suitable corrosion-resistant materials based on the commonly used liquid types, and suitable temperature-resistant materials are selected based on long-term operating conditions.

[0133] Example 8

[0134] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 7, the inner wall surface of the swirl chamber main body 805 is a cylindrical surface;

[0135] The inner wall surface of the vortex chamber contraction section 804 is a frustoconical surface that is coarser at the back and thinner at the front.

[0136] The adjustable liquid fuel atomizing nozzle of Example 8 has a truncated cone-shaped inner wall surface of the swirl chamber constriction section 804, which is coarser at the back and thinner at the front. The inner wall surface of the swirl chamber constriction section 804 enhances the swirl intensity and forms a thinner liquid film. The liquid film is finally ejected by 803 to form a liquid mist, resulting in a better atomization effect.

[0137] Example 9

[0138] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 8, a hose clamp 3 is provided at the rear end of the top cover 5 to lock and seal the rear end of the top cover with the stroke control part of the adjusting rod 1.

[0139] The adjustable liquid fuel atomizing nozzle of Embodiment 9 is equipped with a hose clamp 3 at the rear end of the top cover 5. Within the allowable stress range of the material, the hose clamp is deformed to press the external thread 101 of the stroke control part of the adjusting rod 1. This can lock the external thread 101 of the stroke control part of the adjusting rod 1, prevent the adjusting rod 1 from vibrating and causing problems such as loosening and displacement of the center body 6, and also play a sealing role.

[0140] Example 10

[0141] Based on the adjustable liquid fuel atomizing nozzle of Embodiment 9, a top cover sealing groove 502 is formed on the rear side of the joint between the adjustment part of the top cover 5 and the positioning plate 503.

[0142] The outer periphery of the annular adjusting sealing gasket 4 is embedded into the sealing groove 502 of the top cover.

[0143] Preferably, the adjustable liquid fuel atomizing nozzle also includes a liquid supply interface 2;

[0144] The liquid supply interface 2 is threadedly connected to the liquid inlet 504 of the top cover 5.

[0145] Preferably, the axial adjustable distance range of the central body 6 is less than 30 mm.

[0146] The adjustable liquid fuel atomizing nozzle of Embodiment 10 has a positioning plate 503 that can position the maximum depth of the adjusting rod 1 and the position of the elastic annular sealing gasket 4. The annular adjusting sealing gasket 4 can be embedded in the sealing groove 502 of the top cover. The adjusting rod 1 presses the adjusting sealing gasket 4 and is fixed in position by the hose clamp 3, so that the thread of the adjusting rod 1 produces a sealing effect. There are double anti-leakage measures between the top cover 5 and the adjusting rod 1 to prevent leakage problems under high pressure liquid supply conditions. The adjustable liquid fuel atomizing nozzle adopts multiple measures such as radial anti-vibration boss, 3 sets of sealing gaskets / rings, threaded seal, welded seal, hose clamp, spring with large preload, guide rail, and positioning column, which can better ensure that the nozzle can be used for a long time and can be frequently adjusted.

[0147] In the installation of this adjustable liquid fuel atomizing nozzle, the bottom cover 8 is first fixed, and the swirling core 7 is aligned with and inserted into the positioning post 802 of the bottom cover. When correctly inserted, the radial anti-vibration boss 703 should not be clearly visible. The specially designed perforated sealing ring 10 is then pushed into the spring hole 704, aligning the perforated position of the sealing ring 10 with the spring hole 704. The center body 6 is then inserted along the adjusting guide rail 701. Due to the presence of the adjusting guide rail 701, there is no need to determine whether the helical spring 602 fixed on the center body 6 is accurately inserted into the spring hole 704. This allows for the installation of a conventional... The sealing ring 10 is pushed into the vortex core sealing groove 702 of the vortex core 7. Then, the top cover 5 is attached to the bottom cover 8 and tightened along the thread to press the cavity sealing gasket 9. If possible, the relative positions of the top cover 5 and the bottom cover 8 are fixed by spot welding (the spot weld can be polished during disassembly). Finally, the adjusting rod 1 is inserted and tightened along the thread to press the annular adjusting sealing gasket 4 and the sealing ring 10. At this time, the center body 6 is in the maximum adjustable depth position. Then, the hose clamp 3 is tightened to make the thread also produce a better sealing and fixing effect. During disassembly, first loosen the hose clamp 3, unscrew the adjusting rod 1, slide the center body 1 along the guide rail, then pull out the vortex core 7, and then polish the spot weld.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adjustable liquid fuel atomizing nozzle, characterized in that, It includes an adjusting rod (1), a top cover (5), a bottom cover (8), a vortex core (7), a central body (6), and multiple helical springs (602); The top cover (5) has an adjustment part and a rear cavity part that are coaxially connected in sequence from front to back, and the inner diameter of the rear cavity part is larger than the inner diameter of the adjustment part. An annular positioning plate (503) is formed on the inner side of the middle part of the adjustment section; The adjustment part on the front side of the positioning plate (503) is integrally fixed and connected to a liquid inlet hole (504); The bottom cover (8) has a front cavity part, a swirling chamber main body part (805) and a swirling chamber contraction part (804) that are coaxially fixedly connected from rear to front, and a nozzle (803) is formed at the front end of the swirling chamber contraction part (804); The inner diameter of the front cavity is larger than the inner diameter of the main body of the vortex chamber (805), forming a step at the joint; The rear cavity is coaxially connected and fixed to the front cavity to form the main cavity of the nozzle; The swirling core (7) has a core travel section and a core swirling section that are integrally and coaxially fixed from back to front; The inner diameter of the core swirling section is smaller than the inner diameter of the core travel section, forming a step at the joint; Multiple tangential grooves (706) are uniformly formed circumferentially on the inner wall of the front part of the core swirling section; Multiple spring holes (704) with rearward openings are evenly arranged along the circumferential direction on the tube wall of the core swirling section. The swirling core (7) is assembled and fixed in the main cavity of the nozzle, with its front end attached to the rear end of the tube wall of the main body of the swirling chamber (805). The central body (6) has a central body guide part and a central body adjustment part (604) that are integrally and coaxially fixedly connected from the rear to the front; The outer diameter of the central body guide portion is larger than the outer diameter of the central body adjustment surface (604), forming a step at the joint; The central body (6) is coaxially assembled in the swirling core (7) and can move back and forth. The central body adjustment part (604) is inserted into the swirling part of the core of the swirling core (7) and is fitted with a gap between the core and the inner wall of the swirling part. The plurality of helical springs (602) have their front ends respectively placed in the corresponding spring holes (704), and their rear ends respectively abutting against the front end of the central body guide portion; The adjusting rod (1) has a stroke control part and a connecting part (102) that are integrally and coaxially fixed to each other in the front and rear. The outer diameter of the stroke control part is larger than the outer diameter of the connecting part (102), forming a step at the joint; The outer diameter of the stroke control part is larger than the inner diameter of the annular positioning plate (503), and the outer diameter of the connecting part is smaller than the inner diameter of the annular positioning plate (503); The connecting part passes through the annular positioning plate (503) and its front end abuts against the rear end of the central body (6); The stroke control unit is assembled together with the rear part of the adjustment unit of the top cover (5).

2. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, The rear end of the stroke control section of the adjusting rod (1) is provided with an internal hexagonal groove (104); The front end (103) of the connecting part of the adjusting rod (1) is a circular plane.

3. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, The step at the junction of the vortex chamber main body (805) of the bottom cover (8) and the front cavity body is a flow guide rounded corner (806).

4. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, Multiple axial adjustment guides (701) are formed circumferentially on the inner wall of the core travel section; Multiple axial ribs (601) are formed circumferentially on the outer side of the central body guide section; The rib (601) on the outer side of the guide section of the center body is matched and assembled with the adjusting guide rail (701) on the inner wall of the core stroke section to fix the circumferential position of the center body (6) relative to the swirling core (7).

5. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, A radial anti-vibration boss (703) is formed on the outer side of the swirling core (7); The radial vibration damping boss (703) and the bottom cover (8) are in clearance fit.

6. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, The inner wall surface of the main body (805) of the cyclone chamber is cylindrical; The inner wall surface of the vortex chamber contraction section (804) is a frustoconical surface that is coarser at the back and thinner at the front.

7. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, A hose clamp (3) is provided at the rear end of the top cover to lock and seal the rear end of the top cover with the stroke control part of the adjusting rod (1).

8. The adjustable liquid fuel atomizing nozzle according to claim 1, characterized in that, The axial adjustable distance range of the central body (6) is 30 mm for millimeter-level nozzles.

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